. steven tyler is reportedly in the mix as well. he played coy a couple of weeks ago. >> are you going to do "american idol." ? >> i don't know. is that the rumor you heard? >> everybody is saying it. >> i don't know. they haven't called me yet. they got to lay out some bread for me. >> reporter: it's been a dizzying game of musical chairs. on the judges' panel. kara joined, then paula left, and ellen arrived, now simon, ellen, and kara are all gone. the last man standing? randy jackson. >> i'm going to honestly, honestly miss you. it's been a blast. thank you. >> reporter: the big question, can "idol" ever again find the right mix? especially after losing their sharp-tongued standout. simon cowell is launching his own talent show, "the x factor" on fox. >> american idol, without simon it's like "the ellen show" without ellen. it's weird. it will limp along. hopefully, it will find some new chemistry that will make it relevant to a whole new generation. >> reporter: whatever they decide, they better do it soon. callbacks start in a couple of weeks. for "good morning america," jeremy hubba

totally dismissed for too many demands and is now back in. and steven tyler's reportedly in the mix as well, though aerosmith's front man played coy when a tmz camera caught up with him a couple of weeks ago. >> are you doing "american idol"? >> i don't know, that the rumor you heard? you know, i don't know, they haven't called me yet. >> are you friends with j. lo? >> they've got to lay out the bread for me. >> reporter: it has been a dizzying game of musical chairs on the judge's panel the past couple of seasons. first kara joined. then paula left and ellen arrived. now simon, ellen and kara are now gone. the last man standing, randy jackson. >> i'm going to honestly, honestly miss you. it has been a blast. thank you. >> reporter: the big question, can "idol" ever again find the right mix, especially after losing their sharp-tongued standout?